CVE-2026-109699 ThemeGrill CVE debrief

Who should care

Defenders responsible for WordPress installations using the User Registration plugin, specifically those using versions up to 5.2.8, should assess their exposure and prioritize updating the plugin.

Why it matters

CVE-2026-109699 is a MEDIUM-severity vulnerability in the WordPress User Registration plugin that requires verification and potential updates to prevent unauthorized access.

• Defenders need to verify the plugin version and update if necessary to prevent potential unauthorized access.

Technical summary

The vulnerability is a Missing Authorization issue in the WordPress User Registration plugin, affecting versions up to 5.2.8. It allows for Exploiting Incorrectly Configured Access Control Security Levels, with a CVSS score of 5.4 and MEDIUM severity.

Defensive priority

Defenders should prioritize verifying the version of the User Registration plugin in use and ensuring it is updated to a version beyond 5.2.8 if possible. They should also review access control configurations for the plugin.

Recommended defensive actions

• Verify the version of the User Registration plugin in use
• Update the plugin to a version beyond 5.2.8 if possible
• Review access control configurations for the plugin

Evidence notes

The CVE record and source item provide details on the vulnerability, including its CVSS score and affected versions. However, there is limited information on potential exploits or impacts.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.